<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <script>
        //class Person {}
        // 等价于
        class Person {
            constructor() {}
        }
        let person1 = new Person();
        // 正常： Person {}
        console.log(person1)
        // 报错： TypeError: Class constructor Person cannot be invoked without 'new'
        let person2 = Person();
    </script>
</head>
<body>
    
</body>
</html>